• Listen Technologies LR-4200-072 Intelligent DSP RF Receiver
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Listen Technologies LR-4200-072 Intelligent DSP RF Receiver | 72 MHz

Listen Technologies LR-4200-072 Intelligent DSP RF Receiver | 72 MHz

SoundPro Item: 17288 | Part Number: LR-4200-072

$209.00
$239.00 $209.00
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MSRP: $239.00 | MAP: $209.00

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  • Best-In-Class RF Sensitivity With 20dB Lower Noise Floor Ensures Consistent Reception In Challenging Environments
  • Integrated Neck Loop And DSP Loop Driver Eliminate External Accessories For T-Coil Hearing Aid Users
  • Rechargeable Lithium-Ion Battery Delivers Eight Hours Runtime With 2.5 Hour Full Charge Cycle
  • Dual Output Jacks Support Shared Listening Or Connection To Body-Worn Induction Loops
  • OLED Display Presents Channel Assignment And Battery Status Without Staff Intervention
  • Free iDSP Software Enables Centralized Programming And Inventory Management Across Receiver Fleets
  • Field-Replaceable Battery Design Extends Lifecycle And Reduces Total Cost Of Ownership
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The LR-4200-072 receiver brings intelligent DSP technology to professional assistive listening installations requiring dependable RF performance and extended runtime. Engineered with best-in-class RF sensitivity and 20dB lower noise floor than competing receivers, this unit serves boardrooms, lecture halls, courtrooms, and worship spaces where speech intelligibility cannot be compromised. The integrated neck loop and DSP loop driver optimize magnetic coupling for T-coil-equipped hearing aids, eliminating the need for external accessories that add cost and complexity to AV installations.

Advanced lithium-ion battery technology provides eight hours of continuous operation and recharges fully in 2.5 hours via standard micro USB connection. The OLED display presents channel assignment, volume level, and charge status at a glance, reducing support calls and venue staff intervention. Dual 3.5mm output jacks enable shared listening or connection to body-worn audio induction loops. Free iDSP software supports centralized programming, inventory tracking, and firmware management across receiver fleets. Field-replaceable battery design extends lifecycle and reduces total cost of ownership for integrators managing ADA compliance programs.

Operating across 72-76 MHz with 17 wideband and 40 narrowband channel options, this receiver pairs with Listen Technologies stationary transmitters for fixed installation or tour guide systems. Programmable squelch and automatic RF loss detection maintain connection integrity in challenging RF environments. The ultra-compact form factor simplifies dispensing workflows and storage in charging cases while meeting the ergonomic needs of extended-wear users.

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Specifications

Certifications
Compliance
FCC Part 15, Part 90, Industry Canada, RoHS
Audio
Frequency Response
50 Hz - 15 kHz (±3 dB)
Total Harmonic Distortion
< 2% at 80% deviation
Signal to Noise Ratio
80 dB (SQ enabled), 60 dB (SQ disabled)
Output
Two (2) 3.5 mm unbalanced, 0 dBu nominal, 16 mW maximum, 32 ohm impedance
System Distortion
< 2% total harmonic distortion (THD) at 80% deviation
System Frequency Response
50 Hz - 15 kHz (±3 dB)
System Signal to Noise Ratio
SQ enabled 80 dB, SQ disabled 60 dB
Connectivity
Output(s)
Two (2) 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm
Controls
User Controls
Power, up/down volume
Programming
Via software and USB port
Channel Selection
Press and hold up/down volume buttons for 5 seconds, use up/down to select
Set-up Controls
Press and hold up/down volume buttons for 5 seconds to enter channel adjust, use up/down to select channel
Included Items
Includes
One (1) LR-4200-072 receiver, quick start guide, field replaceable lithium-ion battery
Environmental
Operating Temperature
14 to 104 °F (-10 to 40 °C)
Storage Temperature
-4 to 122 °F (-20 to 50 °C)
Relative Humidity
0 to 95% non-condensing
Temperature - Operation
14 to 104 ºF (-10 to 40 ºC)
Temperature - Storage
(-)4 to 122 °F (-20 to 50 °C)
Shipping
Shipping Weight
3.20 oz. (91 g) with 1.0 lbs. (454 g) minimum
RF
Frequency Range
72.0250 - 75.9500 MHz
Number of Channels
17 wideband, 40 narrowband
Sensitivity
0.6 µV typical, 1 µV maximum for 12 dB SINAD
Frequency Accuracy
±0.005% stability 32 to 122 °F (0 to 50 °C)
Squelch
Programmable in 20 steps, automatic on RF signal loss
Antenna Type
Earphone/neck loop lanyard and short earphone cable or standard earphone cable
Power
Power Supply
Micro USB connector, 5 V, 500 mA
Battery Type
Lithium-ion 3.7 Vdc, 1200 mAh
Battery Life
8 hours continuous use
Battery Charging Time
2.5 hours to full charge
Indicators
LED
Flashes when batteries low or charging, solid when fully charged
Display
Channel designation, battery level, unit number, charging status
LEDs
Flashes when batteries are low or to indicate charging, solid when fully charged
Physical
Dimensions (H x W x D)
3.75 x 2.00 x 0.64 in. (9.6 x 5 x 1.7 cm)
Dimensions with Belt Clip
3.75 x 2.00 x 0.80 in. (9.6 x 5.0 x 2.1 cm)
Unit Weight
1.60 oz. (45 g)
Unit Weight with Batteries
2.40 oz. (68 g)
Color
Black

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